Sexual Diversity m Protozoa 



121 



Figure 33. Beginning of conjugation in Epistylis, after Wallengren, 

 1899. The small active male is attaching itself to the side of the large 

 inactive female. 



Figure 34. Successive steps in the process of conjugation in Vorti- 

 cella nebulifera, after Maupas, 1889. The small male unites with the 

 base of the female; its protoplasm entering the body of the latter, so 

 that finally only the outer layer remains outside (at F), finally drop- 

 ping off. 



